Multi touch actually plays a big role... if you don't have it coupled with a virtual keyboard that enables multi touch input (as we do on the Evo) text messaging or typing in general on the phone is flat out miserable and annoying. It mis-reads left and right, and you're forced to trot along at 1/4 of the speed you really can achieve.
Games, again. Seeing as this phone is like the Evo, and has great hardware, why would a game on it be an issue? Well, for one, you have no hardware keyboard to map buttons to, and are forced to use on-screen controls. Alright, no biggie, wait, no, biggie. You can't really play anything aside from either a cheap MMO or text-based game unless you have multi touch, as I've yet to see many a game that actually are based around one button inputs at a time.
Web browsing. Yes, being able to operate your phone one handed is a plus over having to hold with one hand and pinch with the other, but, when you DO have the time to sit and browse, you're most likely holding it and using your free hand to browse and motion across the pages. Multi touch in this instance makes web browsing STUPID easy and fast. If you're on the go, I prefer the tap to zoom buttons on screen. The thing is, multi touch here would, again, make things much better and flow smoothly.
Having multi touch enabled on this phone, or any touch screen phone with the capability, isn't because we want it like the iPhone, Merolas, it's because it makes things easier to do on the phone. Isn't that the ultimate goal when making something like these? It's got tons of potential for the code monkey and hacker groups out there, but if you take it out the box, as 90% of consumers do, it should be one of the most straight forward and simple to operate things out there. If it ends up being annoying to use, lacking things that we find normal on most, and overall VERY basic and stripped down, why would anybody want it? I can tell you this much, if the Evo, when it was released, didn't have 720p video recording and the front facing camera was disabled until an update in the 'near future' was put out, I would probably shy away from it. Those are a few things that I was actually looking forward to. Then, if they came out and said, "Well, we really couldn't find that many uses in our opinions, so we've decided to disable them for this device.", I can GUARANTEE you the only people going to buy the phone would be mis-informed customers that have never watched or browsed anything tech related. Even then, they would see the flaws with their brand new, shiny device, and more than likely return it for something else that actually performs as advertised. For the literal minded here, that will take what I'm saying as exact, with things like, "Well the x10 doesn't HAVE a front facing camera, and we're supposed to get 720p video recording.... you're a big dummy head.", I'm not relating it directly to that. I'm simply giving it something to compare to in a fantasy similar situation. The phone is 100% capable of doing what it's been claimed NOT to be able to do, and yet the company who produces it is still willing to shit all over their name for the sake of laziness, and not wanting to provide support for their products.
I CAN say this from reading up on this sub-forum and reading around about the whole x10 line, I will NEVER buy a Sony smart phone, whether it be Android, some generic crap one, Windows Mobile, or whatever new mobile OS comes. Just like Samsung, they seem to love to piss people off and cripple their devices purposefully before half a years time passes. That right there, is reason enough for not a single soul to want anything they make.
In short from what I'm feeling after all that, the x10 would be the perfect phone for someone who enjoys light web browsing (nothing really vigorous, spending an hour or two would considered a bit long here), sending text messages, getting email, light facebook integration, and a varied degree of multimedia use and playback.
This phone COULD have been more than what it's being reduced to, but that's just how some companies like their stuff. Dreamer devices.